試題詳解

2. A long solenoid of 500 turns carrying a current of 3.8 A produces within itself a uniform magnetic flux of 2.0 mWb. What is the self-inductance of the coil?
(A) 0.13 H
(B) 0.26 H
(C) 0.36 H
(D) 0.46 H
(E) 0.52 H